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Slideshow

Development of Electrochemical Atomic Layer Deposition (E-ALD) Methods for IV-VI Semiconductors

Pauline Howell
Pauline Howell
Chemistry Building, Room 400
Analytical Seminar

Electrochemical atomic layer deposition( E-ALD) is a technique pioneered by the Stickney research group. E-ALD makes use of underpotential deposition to deposit surface limited amounts of material, improving control and quality of thin films.1 In order to create a successful deposition sequence, cyclic voltammetry studies are done to find appropriate deposition parameters. Choice of solution electrolyte and pH have major impact on the deposited films. In these studies, both SnSe and GeSe are investigated. SnSe and GeSe are chalcogenide semiconductors with uses in various devices. SnSe is an absorber material that can be used in photovoltaic devices as well as phase change memory data storage devices.2 GeSe is a material that can be used in Ovonic Threshold Switching selector devices.3 This talk will show the role of solution electrolyte has on deposition control of SnSe. It will also cover studies on pH dependence in an effort to deposit GeSe.

 

1. Abstr. Pap. Am. Chem. S. 1991, 201, 289-Coll.

2. Electrochem. 2002, 18 (8), 349-366.

3. Appl. Phys. Lett. 2013, 103, 042908

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